Rifle-barrel attachment and ammunition for shotgun barrels



'May 20, 1930. 1,759,772

RULE BARREL ATTACHMENT AND AMMUNITloN FOR sHoTGUN BARRELs E. A. WILLIAMSFiled Aug. 50, 1928 In/vanto@ Patented May 20, 1930 UNITED EDGAR A.WILLIAMS, 0F UPPER BLACK EDDY, PENNSYLVANIA Application filed August 30,1928. Serial No. 302,999.

The invention relates to means for adapting shot gun barrels for riflesand has for its object the provision of an improved construction ofrifle barrel applicator for shot gun barrels including means forreducing the weight of the riiie barrel applicator consisting in theprovision of a plurality of longitudinal grooves in the outer face ofthe rifle barrel providing a plurality lof splines or fins that byengaging the inner face of the shot gun barrel serves to reinforce therilie barrel when in place in the shot gun barrel and also to preventbending of the rifle bar-v rel when removed from the shot gun barrel,the invention also contemplating improved means for holding the riiebarrel attachment in the shot gun barrel.

A further object of the invention is the provision of an improvedconstruction of ammunition for use with rifle barrel attachments forshot gun barrels.

rlhe invention will be described in detail hereinafter and will be foundillustrated in the accompanying drawings in which Figure 'l is a sideView in elevation of a shot gun showing the rifle barrel attachment inposition therein.

Figure 2 is a longitudinal sectional view of a shot gun barrel with therifle barrel attachment and one type of ammunition in place therein.

Figure 3 is a transverse sectional view on an enlarged scale on a planeindicated by the line 8 3 of Figure 2, and y f Figure t is a fragmentallongitudinal scctional View similar to Figure 2 showing amodifledconstruction of ammunition for the attachment.

In the drawings similar' reference characters are used to designatecorrespondingparts throughout the several views.

In the drawings the rifle barrel attachment is shown applied to a shotgun of the Remington repeating type, model lO-A designated A, and havingits barrel B provided with an enlarged chamber C at the breech of thebarrel and formed with an inclined annular shoulder D between thechamber C and the bore Z) of the barrel. rlthe rifle barrel attachmentis designated l and is formed ential shoulder D. The muzzle end of thebarrel l has a reduced and threaded portion le `that is engaged by athreaded ring nut 5 having a circumferential flange 6 that abuts themuzzle end of the shot gunbarrel B to hold the rifle barrel attachment lsecurely within the bore ZJ of said shot gun barrel B.V The riiie barrelattachment 1- is provided with a plurality of longitudinal grooves 7extending from the shoulder 3 within a short distance of the muzzle ofthe barrel, said groove-being provided to lighten the Weight of theattachment and of the adapted shot gun when in place in the barrelthereof, said grooves forming a plurality of radial fins S having theirouter edges engaging the inner face of the bore Z2 when the attachmentis in position and serving to reinforce the rifle barrel, said fins alsoserving to prevent bending of the attachment when not in place in theshot gun barrel. rlhe riiiing of the bore 9 of the attachment l is shownas threads or beads l07 the number shown for illustration being four ofsuch threads or beads, but it will be apparent that the number may beless than that shown or more as may be preferred.

To promote greater accuracy in the use of the weapon the rifling l0 endsremote from the muzzle end of the barrel as shown at llE to eliminateany possibility of the burrs formed at the rear end of the bullet causedby thecutting of the bullet by the-riiiing from causing any deflectionas the projectile leaves the rifle barrel, since the projectile willpass out from a perfectly smooth surface, and at the same time thedistance between the ends of the rifling and the muzzle of the barrelwill be so slight that no apparent resistance will be given to thespinning motion that is imparted to the projectile.

As hereinbefore stated the invention also includes ammunition adaptedfor use in connection with the rifle barrel attachment to provide meansby which the ammunition chamber C of the shot gun barrel B may beutilized for the rifle projectile and the ammunition may be used inconnection With the magazine E of the shot gun A.

In Figure 2 is shown one form of the adapter in Which the shell 12 maybe of paper as is commonly used for shot gun ammunition in which isprovided a tubular filler 13 that r'ceives a rifle cartridge le oi'conventional type in which the projectile is lesignated 15, explosive16, and a fulminate 1'?. The breech end of the adapter is provided withthe sheet metal closure commonly used With shot gun shells anddesignated 18, the closure 18 being provided With an opening 19 toreceive the shell or cartridge 14C. 20 indicates a Wad of any suitablematerial to hold the tubular filler 13 in position, said Wad beingprovided With an opening 21 that is alined with the t bular opening inthe filler 13 and with the rifle barrel bore 9, said Wad being held inposition by crimping the adjacent edge of the shell 12 sliovvn at 22.rllie breech end of the riie barrel attachment 1 is reduced as shown atz3 to receive the crimped portion 22 or. the shell Tvlien the ammunitionadapter is in position as shown in Figure 2.

In Figure 4: is shown a modified 'form ot' ammunition in which the shell24 is also ma le of any cheap material, such for instance as paper, eshereinbeore described in connection with the shell 12 and the filler 25is provided with an enlarged chamber 26 to receive the explosive 27, andthe projectile 28 is held in positionL in the tubular opening 29, 30indicating the Wad similar to the Wad 2O and 3l is the crimped portionof the shell that ts in the reduced portion 23 of the attachment 1. 32is the fulminate for exploding the eXplosive 27, the cartric ge thereforbeing held in the sheet metal reinforcement 33.

1. ln an attachment for gun barrels, a small caliber gun barrel adaptedto be inserted in a gun barrel and having longitudinal grooves in itsouter surface.

ln an attachment for gun barrels, a small caliber' gun barrel adapted tobe insert-ed in gun barrel, and a shoulder on said small caliber barrelto engage a shoulder in the bore of the gun barrel.

3. in an attachment for gun barrels, a

small caliber gun barel adapted to be inserted in a G'un barrel, thebreech end or said small caliber barrel being en being adapted to beinserted in a gun barrel and the edges of said fins to engage the innerWall of said barrel, the breech end of the tubular member being reducedto receive the crimped end of a shell, and means to hold the tubularmember in the barrel.

5. A cartridge adapter for firearms, coniprising a shell, a tubulariiller in said shell, a compressible Wad in said shell in front oi' saidtubular filler adapted to be compressed against the rear end of asubcaliber barrel Within a: irearm barrel to provide a gas tight jointWith said rear end.

6. An adapter cartridge for firearms equipped with sub-caliber barrelscomprising a shell, a tubular filler in said shell extending from thebase of said shell substantially to 'he Jforward end thereof, saidtubular iller being' adapted to contain an explosive and projectiles, acompressible -Wad in said shell in iront of said tubular Eller adaptedto be compressed against the rear end of a subcaliber barrel Within afirearm barrel to provide a gas tight joint With said rear end,

7. An adapter cartridge for firearms equipped with subcaliber barrelscomprising a shell, a tubular filler in said shell extending from thebase of said shell substantially to the `forward end thereof, saidtubular filleri being adapted to contain an explosive and projectiles, acompressible Wad in sait` shell in front of said tubular filler adaptedto be com ressed against Jche rear end ot a subcaliber barrel Within afirearm barrel to pros tight joint With said rear end, and e providedwith a recess in front of said check.

8. In a rifle barrel, a barrel having bore ot the same diameterthroughout its length, rifle ribs projecting inwardly of the Walls ofsaid bore, said ribs ending remote from the muzzle of the barrel, thesmooth bore at the muzzle of the barrel permitting escape olf the gasesof the explosion in advance of the proj ectile through the groovesforme-d therein by the ribs and reducing the pressure behind theprojectile before discharge from the barrel to prevent deflection of theprojectile.

9. A rifle barrel attachment for gun barrels, comprising a tubularmember, longitudinal fins on said tubular member, said member beingadapted to be inserted in a` gun barrel, the breech end of the tubularmember being reduced to receive the crimped end of a shell, and meanstov hold the tubular member in the barrel.

In testimony Whereoic I a'li'iX mv signature.

EDGAR A. WILLIAMS).

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